Combined seaming and pinking machine



Oct. 26, 1937. H. c. MouLToN `2,097,356 i COMBINED SEMING AND PINKING MACHINE Filed Sept. 13, 1935 2 Sheets-Sheet 1 Jn/vendor,

Harley .Jfmlzm 0ct.'26, w37. H. c. MouLToN 2,097,336

I COMBINED SEAMING AND PINKING MACHINE Filed Sept. 13, 1935 2 Sheets-Sheet 2 8 fr@ awww,

Patented Oct. 26, l1937 UNITED STATES COMBINED SEAMING AND PINKING MACHINE Harley C. Moulton, Maplewood, Mo., assignor to Lewis Invisible Stitch Machine Company, St. Louis, Mo., a corporation of Maine Application September 13, 1935, Serial N0. 40,511

17 Claims.

This invention relates to new and useful improvements in combined seaming and pinking machines and is directed more specifically to improvements over the Gruman Patent 1,891,308,

Dec. 20, 1932 and the Popper Patent 1,922,453,

Aug. 15, 1933.

Among the several objects of the invention are to provide a removable pinking attachment wherein a very simple and eicient means is provided for varying the frictional contact between the movable and stationary cutting members, and to provide means for swinging andv retaining the movable cutter member out of engaging position with respect to the ledger blade'opening when the attachment is removed from the sewing machine.

Another object of the invention lies in the provision of an extremely simple means for mounting the pinking attachment on the work support and for connecting the movable blade with the driving means, or for removing'the attachment from the work support and for disconnecting the movable blade from the driving means.

With these and other objects in View which will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is a front elevation of a combined seeming and pinking machine constructed in accordance with my invention,

Figure 2 is an enlarged rear elevation of the 35 pinking attachment,

Figure 3 is a vertical longitudinal sectional view therethrough, and

Figure 4 is a horizontal sectional view taken immediately below the cutter arm.

Like reference numerals designate corresponding parts throughout the several figures of the drawings.

lReferring to the drawings, the sewing machine A includes a work support 5, a standard 6 pro- 45 jecting upwardly from the right hand end of the work support, an overhanging arm 1 extending laterally from the upper end of the standard 6, and a head 8 mounted on the free end of, the

overhanging arm l. Journaled in the upper end of the standard 6 and the overhanging arm 'l is a main driving shaft 8 and mounted for vertical reciprocations in the head 8 is a needle bar I0 which carries a needle Il, the needle bar being reciprocated from the main shaft through the medium of the usual driving connections Whereby the needle is reciprocated once for every rotation of the main shaft.

Mounted on the work support 5 directly below the head 8 is a throat plate I2 having the usual needle opening therein, and also provided with feed slots I3 for receiving a feed dog I4, the needle being adapted to cooperate'with a loop taker (not shown) of any desired character for the purpose of forming stitches. A presser bar I5 is yieldably supported in the head 8 in the usual mannerl and carries at its lower end a presser foot I6.

Mounted on the work support 5 directly under the overhan-ging arm 'l is a base I1. This base is adjustable toward and from4r the needle II and is removably held on the work support in any adjusted position by means of the single clamping bolt I8. A cutter arm or support I9 is pivotally mounted on the base I'l through the medium of a transverse horizontal pivot pin 20, the pivot being located at the end of the base opposite the needle Il. The base I'I is provided at its end opposite the pivot 2D with two forwardly extending arms ZI, 2| to which is attached by means of screws 22, 22 a stationary or ledger blade 23 having a V-sliaped cutter opening 2li formed therein and forming resultant converging cutting edges, the apex of the V projecting toward the needle II. Mounted in the free end of the cutter 'arm I9 is a transverse horizontal bearing pin 25 disposed in parallelism with the pivot 20, and journaled on this pin is a .depending cutter arm 26 having a V-shaped cutter blade or knife, 2l attached thereto by a clamping bolt 28, said knife having converging cutting edges adapted for cooperation with the converging cutting edges of the ledger blade. The cutter arm, and consequently the knife 2l, is normally inclined downwardly and forwardly toward the needle II. The angle of the ledger blade opening 24 is slightly greater than the angle prescribed by the cutting walls or edges o-f the movable blade or knife 2l, as described and shown in the Gruman Patent 1,891,308 and the Popper Patent 1,922,453. Guide lugs 29, 29 are integral with and extend upwardly from the ledger blade 23 on opposite sides of the opening 24 and serve to maintain the cutting members in alinement, as described in the Popper patent heretofore mentioned.

It is desirable to yieldably retain the knife 21 in cooperative cutting relation with the walls or edges of the opening 24 of. the ledger blade 2,3 and for this purpose I have mounted a lever 30 to swing about a transverse pivot 3| mounted in the cutter arm I9 intermediate the pivot 20 of the arm and the pivot of the movable blade. 'I'he lever 30 is in effect a bell crank lever and comprises a rearwardly extending arm a and a forwardly and downwardly extending arm 30h. A flat link 32 extends longitudinally of the cutter arm I 9 and has its forwardiend connected to the upper end of the arm 2S by a screw 33 and its rear end connected to the arm 30b of the lever 30 by a screw 34. A pin 35 is slidably mounted in the longitudinal opening 36 formed in the rear end of the cutter arm I9 and is provided at its inner end with an eye 31 to which the rear end of a coil spring 38 is connected, the forward end of the spring being connected by a screw 39 to the rear arm 3,0a of the lever 30. 'I'he rear end of the pin 35 projects outwardly beyond the rear end of the cutter arm I9 and is threadably engaged by a manually operable screw 40 which bears against the rear end -of said cutter arm and functions to vary the tension of the spring 38. The spring 38, therefore, functions to swing the lever 30 and consequently maintain the knife 21 in yielding engagement with the cutting edges of the opening 24 of. the ledger blade. When removing the movable blade 21 for the purpose of renewal or sharpening, it is desirable to remove the tension of the spring 38 on said blade in order that the blade may be moved rearwardly and out of cutting relation with the cutting edges of the ledger blade. For this purpose, a manually operable stop screw 4I is mounted in the cutter arm I9 directly above the arm 30e of the bell crank lever 30, the screw being normally spaced above and out of contact with said arm 30l to permit the spring 38 to function in maintaining the cutting blades in yieldable engagement. When, however, it is .desirable to remove the attachment, the screw 4I is turned down to engage the arm 30a to thereby swing the lever 30 and to swing the movable blade rearwardly out of cutting relation with the ledger blade,

In order to reciprocate the movable blade or knife 21 in proper timed relation to the needle reciprocations, I have mounted a jack shaft 42 on the overhanging arm 1 of the machine frame and have connected said shaft to the main shaft 9 through the medium of a reduction gear coupling 43 preferably having a 2tol ratio. An

eccentric pin 44 is removably secured by a set screw as shown in Fig. 1 to the forward end of the jack shaft 42 and is connected by a link 45 to the cutter arm I9. Consequently the movable cutter blade or knife is recilocated once for every two revolutions of the main shaft 9.

It will be observed that during downward movement of the cutter blade or knife 21, thelatter will be swung rearwardly due to the difference in .the angular relation between the two f blades and this rearward movement will be resisted by the link 32, the lever 30, and the coil spring 38; that by means of the adjusting screw 40 Athe tension of the spring 38 will be varied and consequently the frictional contact between the cutting elements may be4 varied, and that by means of the manually operable stop screw 4I the knife 21 may be moved positively to retract the same from contact with the cutting edges of the ledger blade 24 and to retain said knife in said retracted position. .A

When it is desired to remove the pinking attachment from the work support, the clamping bolt I8 is withdrawn, thus freeing the base I1 from the work support, and the eccentric pin 44 is then withdrawn from the jack shaft 42 after first releasing the set screw. The attachment is thus separated from the work support and from the jack shaft, and is therefore free to be removed bodily from the machine whereby the machine can be operated for plain seaming. It will be observed that the ledger blade is carried by the base I1 and consequently there will be no obstruction to the material during said plain `seaming operations.

It is of course to be understood that the details of structure and arrangement of parts may be variously changed and modified without departing from the spirit and scope of my invention.

I claim:

1. In a combined seaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary4 shaft journaled in said arm, a vertically reciprocatory needle mounted at the end of said arm and having driving connections with said shaft, and means for cutting pinks in a fabric in timed relation to the needle reciprocations including a ledger blade rigidly mounted on the work support at one side of the needle and having converging cutting edges, a cutter arm pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm and having converging cutting edges, a driving connection between the main shaft and the cutter arm for reciprocating the latter, and means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter arm and connected with the knife, and a coil spring connected to the lever and to the cutter arm. Y

2. In a combined seaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a

lvertically reciprocatory needle mounted at the end of said arm and having driving connections with said shaft, and means for cutting pinks in a fabric in timed relation to the needle reciprocations including a' ledger blade rigidly mounted on the work support at one side of the needle and having converging cutting edges, a cutter arm pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm and having converging cutting edges, a driving connection between the main shaft and the cutter arm for reciprocating the latter, means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter arm and connected with the knife, and a coil springconnected to the lever and to the cutter arm, and an adjustable stop screw mounted on the cutter arm for cooperation with the lever to swing the knife rearwardly with respect to the .cutting edges of the ledger blade.

3. In a combined seaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a vertically reciprocatory needle mounted at the end of said arm and having driving connections pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm and having converging cutting edges, a driving connection between the main shaft and the cutter arm for reciprocatingthe latter, and means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter arm, a link connected at its ends to the knife and lever respectively, and a coil spring connected to the lever and to the cutter arm.

, 4. In a combinedseaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a vertically reciprocatory needle. mounted at the end of said arm and having driving connections with said shaft, and means for cutting pinks in a fabric in timed relation to the needle reciprocations including a ledger blade rigidly mounted on the work support at one side of the needle and having converging cutting edges, a cutter arm pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm and having converging cutting edges, a driving connection between the main shaft and the cutter arm for re' ciprocating the latter, means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter arm, a link connected at its ends to the knife and lever respectively, and a coil spring connected to the lever and to the cutter arm, andan adjustable stop screw mounted on the cutter arm for cooperation with the lever to swing the knife rearwardly with respect to the cutting edges of the ledger blade.

5. In a combined seaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a vertically reciprocatory needle mounted at the end of said arm and having driving connections with said shaft, and means for cutting pinks in a fabric in timed relation to -the needle reciprocations including a ledger blade rigidly mounted on the work support at one side of the needle and having converging cutting edges, a cutter arm pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm and having converging cutting edges, a driving connection between the main shaft and the cutter arm for reciprocating the latter, and means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter arm and connected with the knife, a pin slidably mounted in the piv oted end of the cutter arm, a coil spring connect- ,ing the lever and the pin, and a nut threadably engaged with the pin and abutting the cutter arm for varying the tension of said coil spring.

6. In a combined seaming and pinking machine, the combination with a frame including a work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a vertically reciprocatory needle mounted at the end of said arm and having driving connections with said shaft,and means for cutting pinks in a fabric in timed relation to the needle reciprocations in; cluding a ledger blade rigidly mounted on the work support at one side'of the needle-and having converging cutting edges, a cutter arm pivoted at one end on the work support for movements towards and from the ledger blade, a knife pivoted threadably engaged with the pin and abutting the cutter arm for varying the tension of said coil spring,4 and an adjustable stop screw mounted oni the cutter arm for cooperation with the lever to swing the knife rearwardly with respect to the cutting edges of the ledger blade.

7. In acombined seaming and pinking machine,

the combination with a frame including a Work support, a standard, and an overhanging arm, of a rotary shaft journaled in said arm, a vertically reciprocatory needle mounted at the end of said arm and having driving connections with said shaft, and means for cutting pinks in a fabric in timed relation to the needle reciprocations including a base mounted on the work support under the overhanging arm of the frame, a ledger blade rigidly mounted on the base at one side of the needle and having converging cutting edges, a

cutter arm pivoted at one end on the base for movements towards and from the ledger blade, a knife pivoted on the free end of the cutter arm, a driving connection between the main shaft and the cutter arm for reciprocating the latter, and means for yieldably retaining the cutting edges of the knife in cutting relation with the cutting edges of the ledger blade comprising a lever pivoted on the cutter 'arm and connected with the knife, and a coil spring connected to the lever and to the cutter arm.

8. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal airis, a knife having converging cutting edges for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting `the knife on the free end of the arm for movements towards and from the apex of the ledger blade; means for maintaining the cutting edges of the knife during cutting movements thereof in yieldingr engagement with the cutting edges of the ledger blade, and manually operable means mounted on the arm for moving the knife towards the pivot of the arm and against the tension of said yieldable means and for retaining said knife in its adjusted position.

9. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis, a knife pivoted on the free end of the arm to swing about a horizontal axis disposed in parallelism with the axis of the arm, said knife having converging cutting edges arranged for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from` the pivot of the arm, means for maintaining the cutting edges of the knife during cutting movements thereof in yielding engagement with the cutting edges of the ledger blade, and manually operable means mounted on the arm for swinging the knife toward the pivot of the arm and against the tension of said yieldable means and for retaining said knife in its adjusted position.

10. A pinking mechanism for sewing machines lcomprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis, a knife pivoted on the free end of the arm to swing Vabout a. horizontal axis disposed in parallelism with the axis of the arm, said knife having converging cutting edges arranged for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivotof the arm, means for maintaining the cutting edges of the knife during cutting movements thereof in yielding engagement with the cutting edges of the ledger blade including a coil spring extending longitudinally of the arm and having one end connected to the arm and the other end connected to the knife, and manually operable means mounted on the arm for swinging the knife towards the pivot of the arm and against the tension of said yieldable means and for retaining said knife in its adjusted position.

11. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, a supporting arm pivoted on the base to swing about a horizontal axis, a knife pivoted on the free end of the arm to swing about a horizontal axis disposed in parallelism with the axis of the arm, said knife having converging cutting edges arranged for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for maintaining the cutting edges of the knife during cutting movements thereof in yieldinglengagement with the cutting edges of the ledger blade'including a lever, a coil spring having one end connected to the supporting arm and the other end connected to the lever, and a link connecting the lever and the knife, and manually operable means mounted on the supporting arm for direct cooperation with the lever for swinging the knife toward the pivot of the arm and against the tension of said yieldable means and for retaining said knife in its adjusted position.

12. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, a supporting arm pivoted on the base to swing about a horizontal axis, a vertically disposed knife arm pivoted intermediate its ends on the free end of the supporting arm to swing about a horizontal axis disposed in parallelism with the axis Vof the supporting arm, a knife fixed to the lower end of said knife arm and having converging cutting edges arranged for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for maintaining the cutting edges of the knife during cutting movements thereof in yielding engagement with the cutting edges of the ledger blade, said yieldable means including a' lever, a coil spring'having one end connected to the supporting arm and the other end connected to the lever, and a link connecting the lever and the upper end of the knife arm, and manually operable means mounted on the supporting arm foidirect cooperation with the lever for swinging the knife toward the pivot -of the arm andy the base to swing about a horizontal axis, a

knife having converging cutting edges for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting the knife on the free end of the arm for movements towards and from the apex'of the ledger bladeJ and means for maintaining the cutting edges of the knife duringcutting movements thereof in yielding engagement with the cutting edges of the ledger blade and including a coil spring extending longitudinally of the arm, one end of the spring having connection with the knife and the other end of the spring having connection with the arm.

14. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis,l a knife having converging cutting edges for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting the knife on the free end of the arm for movements towards and from the apex of the ledger blade, and means for maintaining the cutting edges of the knife during cutting movement thereof in yielding engagement with the cutting edges of the ledger blade and including a coil Spring extending longitudinally of the arm, one

end of the spring having connection with the knife, and means engageable with the arm and with the other end of the spring for varying the tension thereof.

15. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis, a knife having converging cutting edges for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting the knife on the free end of the arm for movements towards Aand from the apex of the ledger blade, and means lfor maintaining the cutting edges of the knife during cutting movements thereof in yielding engagement with the cutting edges of the ledger blade and including a coil spring extending longitudinally of the arm, a link having connection with one end of the spring and with the knife, and means engageable with the arm and with the other end of the spring for varying the tension thereof.

16. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis, a knife having converging cutting edges for cooperation with the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting the knife on the free end of the arm for movements towards and from the apex of the ledger blade, and means for maintaining the cutting edges of the knife during cutting movements thereof in yielding engagement with the cutting edges of the ledger blade and including a. coil spring and a connected link extending longitudinally of .the arm, the spring being connected to the arm and the link being connected to the knife.

17. A pinking mechanism for sewing machines comprising a base, a stationary ledger blade having converging cutting edges, an arm pivoted on the base to swing about a horizontal axis, a knife having converging cutting edges for cooperation With the cutting edges of the ledger blade, the apices of the cutting edges of the knife and blade projecting in a direction away from the pivot of the arm, means for mounting the knife on the free end of the arm for'movements towards and from the apex of the ledger blade, and means for maintaining the cutting edges of the knife duringcutting movements thereof in yielding engagement with the cutting edges of the ledger blade and including a lever mounted on the arm intermediate the pivot of the arm and the knife, a link connecting the lever and the knife, and a'coil spring connecting the lever and the pivot portion of the arm.

HARLEY C. MOULTON. 

